Text Render a bit noisy, even at 200 samples
Your object is casting shadows on the plane. Not because of the font/text properties, but because of the way Cycles (path tracing) works. To avoid your text being seen as a shadow caster by Cycles, you can turn off the ray visibility of the text object:


In the outliner, select the object Text.thing
Go to "Object" context
Open the "Visibility" section
Open the "Ray Visibility" subsection
Uncheck the "Diffuse" and "Glossy" property